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2026 Statistics
Key Facts: NM CID GF-7 Exam
70 Q
Official Combined Questions
PSI NM Contractor Bulletin 4/3/2026
75%
Passing Score Each Portion
PSI NM Contractor Bulletin 4/3/2026
USD 68.88
Specialty Exam Fee
PSI NM Contractor Bulletin 4/3/2026
NM CID GF-7 is GF Core (40 Q, free) plus a 30-question tanks and towers specialty, 75% each, USD 68.88 (bulletin 4/3/2026).
Sample NM CID GF-7 Practice Questions
Try these sample questions to test your NM CID GF-7 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Under the federal NPDES Construction General Permit used as the baseline for New Mexico construction stormwater coverage, a Stormwater Pollution Prevention Plan (SWPPP) is required when land disturbance is one acre or more or when the site is part of a larger common plan that will disturb at least how much area?
A.5,000 square feet
B.One acre
C.Five acres
D.Ten acres
Explanation: The current federal Construction General Permit and New Mexico’s authorized NPDES program require construction-stormwater coverage, including a site-specific SWPPP, when a project disturbs one acre or more or is part of a larger common plan of development that will disturb one acre or more. The older five-acre Phase I threshold no longer governs typical tank-pad or tower-compound grading. Coverage is triggered by soil-disturbing activity such as clearing, excavation, and foundation work, not by the finished building footprint alone.
2What is the primary purpose of a construction-site Stormwater Pollution Prevention Plan (SWPPP)?
A.To calculate earthwork quantities for payment
B.To identify pollutant sources and the controls that will keep sediment and other pollutants out of stormwater discharges
C.To replace the building permit and special-inspection program
D.To document only the final landscaping seed mix
Explanation: A SWPPP is the site-specific plan that lists pollutant sources, Best Management Practices (BMPs), inspection duties, and stabilization procedures used to keep construction stormwater from carrying sediment and chemicals off the site. EPA’s construction-stormwater guidance treats the SWPPP as the operating document for erosion control, sediment control, and good housekeeping. It does not replace permits, inspections, or quantity takeoffs.
3On a tank-pad grading site, a silt fence is best classified as which type of control?
A.A source-control erosion practice that keeps soil particles from detaching
B.A sediment-control practice that intercepts already-eroded soil before it leaves the site
C.A permanent storm-drain structure that replaces the detention pond
D.A dust-suppression chemical applied to haul roads
Explanation: Silt fence is a temporary sediment barrier. It does not stop raindrop impact or rill erosion at the source; it ponds sheet flow long enough for some sediment to settle before runoff leaves the perimeter. Erosion controls such as mulch, blankets, and vegetation keep soil in place. Contractors who treat silt fence as the only BMP usually fail after concentrated flow or long slopes overwhelm the fabric.
4When should perimeter sediment controls such as silt fence or berms be installed on a new tank or tower site?
A.After the first significant rain so the drainage pattern is obvious
B.After final grading so the fence is not in the way of earthwork
C.Before major land-disturbing activity so sediment is intercepted from the start of grading
D.Only during the punch-list and final-stabilization phase
Explanation: EPA construction-stormwater practice requires down-gradient perimeter controls to be in place before major clearing and grading. Installing them first intercepts sediment generated by the initial cut. Waiting until after grading or after the first storm allows unprotected discharges. Perimeter BMPs are then maintained through the job and removed only after the tributary area is finally stabilized.
5What is the main purpose of a stabilized construction entrance or exit at a tank-yard or tower compound?
A.To increase the legal highway speed of haul trucks leaving the site
B.To reduce tracking of sediment onto public streets (track-out)
C.To replace the need for inlet protection in the public right-of-way
D.To serve as the only required perimeter sediment control
Explanation: A stone or rumble-strip stabilized entrance knocks soil off tires before vehicles enter the street. Track-out is a common CGP violation and a major source of sediment in curb inlets. The pad must be maintained (add stone, remove accumulated mud) and does not replace inlet protection, silt fence, or street sweeping when tracking still occurs.
6Under EPA Construction General Permit stabilization practice, when construction will stop on an exposed area for 14 or more calendar days, the operator should do which of the following?
A.Leave the soil bare until the next phase starts so the next contractor can regrade freely
B.Initiate temporary or permanent stabilization promptly rather than leaving the soil exposed
C.Remove all silt fence so stormwater can leave the idle area quickly
D.Apply only a dust palliative and skip mulch or seeding
Explanation: EPA CGP stabilization language requires operators to initiate stabilization immediately on areas where construction has permanently ceased or will be inactive for 14 or more calendar days, then complete the measures within the permit’s deadline (commonly 14 days, or 7 days for large unphased disturbances). Temporary mulch, blankets, or seed keep rain from detaching soil while the area sits idle. Leaving bare dirt for weeks is a frequent inspection finding on tank and tower pads.
7Which silt-fence installation practice is required for the fence to function as a sediment barrier?
A.Set the fabric on the ground surface with no trench so it can be relocated daily
B.Install the fence up and down the slope so runoff is concentrated into a channel along the fabric
C.Trench and bury the fabric toe, backfill and compact, and run the fence along the contour to intercept sheet flow
D.Leave a 6-inch gap at the ground so water can pass under without ponding
Explanation: A silt fence works only if runoff cannot pipe underneath and if flow arrives as sheet flow. Standard installation excavates a toe trench, extends fabric into the trench, backfills and compacts, and sets posts on the downslope side. The alignment follows the contour. Running fence down a slope or leaving the toe unburied turns the BMP into a failed dike that blows out at the first storm.
8Storm-drain inlet protection at a tank or tower site is installed primarily to do which of the following?
A.Increase the hydraulic capacity of the public storm sewer
B.Keep sediment-laden construction runoff from entering the inlet before it is treated or settled
C.Replace the need for a concrete washout area
D.Serve as the permanent oil-water separator for the finished facility
Explanation: Inlet protection (filter bags, block-and-gravel, or manufactured inserts) intercepts sediment at curb and area inlets that would otherwise send dirty water straight to the municipal system or a watercourse. It is a last-line sediment BMP, not a drainage upgrade, and it must be maintained so it does not cause flooding. Concrete wash water and petroleum still need separate controls.
9Where should concrete washout from tank-foundation or tower-pier pours be directed?
A.Into the nearest storm inlet after dilution with a hose
B.Onto bare soil at the perimeter silt fence so the fabric can filter the slurry
C.Into a designated, contained washout area that prevents the high-pH slurry from reaching stormwater
D.Into the tank ringwall after the concrete has taken initial set
Explanation: Concrete wash water is highly alkaline and is a listed construction-stormwater pollutant. EPA good-housekeeping practice requires a lined or otherwise contained washout so slurry and solids cannot reach inlets, streams, or groundwater. Diluting into a storm drain or dumping at a silt fence is an illicit discharge. Washout residue is removed and disposed of as hardened waste, not washed off site.
10A construction swale will carry concentrated runoff from several acres of a tank site. Which sediment control is the more appropriate choice than a silt fence placed across the channel?
A.A silt fence stretched tight across the swale invert
B.A sediment trap or basin, or a check-dam sequence designed for concentrated flow
C.A single straw wattles laid on the surface with no staking
D.A dust-control water truck parked in the channel
Explanation: Silt fence is a sheet-flow BMP. Concentrated channel flow blows it out. EPA construction manuals send concentrated runoff to sediment traps, basins, or rock check dams that can handle higher velocities and store sediment. Design storage and outlet protection so the structure does not become a washout point itself.
About the NM CID GF-7 Exam
The New Mexico CID GF-7 classification covers tanks and towers and requires the shared GF Core plus the GF-7 specialty. GF Core is 40 questions in 100 minutes with no charge. GF-7 is 30 questions in 80 minutes for USD 68.88. Each portion requires 75% (bulletin updated 4/3/2026). Specialty references include AWWA welded carbon steel tanks, AWWA Manual M42, Hot-Mix Asphalt Paving Handbook, PEI RP100, Pipe and Excavation Contracting, and related tank standards listed in the bulletin. This English-language MCQ bank is a study aid, not an official PSI form.
Assessment
GF Core plus GF-7 specialty, retained as one classification identity.
Time Limit
180 minutes (100 + 80)
Passing Score
75% on GF Core (30 of 40) and 75% on GF-7 (23 of 30)
Exam Fee
USD 68.88 (GF Core has no charge) (PSI Services LLC (for New Mexico Construction Industries Division))
NM CID GF-7 Exam Content Outline
57%
GF Core
Stormwater, OSHA, project management, surveying, NM One Call, building code/inspections (40 official items)
43%
GF-7 Specialty
Tanks, miscellaneous structures, welding, sitework, paving, towers (30 official items)
How to Pass the NM CID GF-7 Exam
What You Need to Know
- Passing score: 75% on GF Core (30 of 40) and 75% on GF-7 (23 of 30)
- Assessment: GF Core plus GF-7 specialty, retained as one classification identity.
- Time limit: 180 minutes (100 + 80)
- Exam fee: USD 68.88 (GF Core has no charge)
Keys to Passing
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
NM CID GF-7 Study Tips from Top Performers
1Tanks are 10 of 30 specialty items. Study AWWA steel tank standards with welding and excavation safety.
2This bank is an English-language MCQ study aid, not an official PSI form
Frequently Asked Questions
Do I take a separate GF Core exam?
Yes. PSI requires all GF candidates to take the shared GF Core plus the classification specialty. This bank treats them as one GF-7 identity.